Regex replace second pattern by mapping [0-9] to [q-p] in Geany?

I would like to replace 123 456 789 with q23 r56 u89 using Geany regex. So far I can do it with multiple find and replace patterns like this: ... Find: (\D|^)4 Replace: \1r Find: (\D|^)5 Replace: \1t ... I want to combine these 10 statements into one using mapping of \2 by the rule -> [qwertyuiop]. How can I do this in geany?